t191 with LOW contrast ... how to repair ? - GSM-Forum

**Brka** · 06-20-2003, 02:28

i received brand new
t191 v1.24 with very low contrast

setting E2P default didnt help
flashing to v1.71 also didnt help

any working idea ?

b.r.
ALex.

key · 06-20-2003, 03:19

try it code *#402# OK--adjust display intensity/contrast
whether varies contrast? You try rewrite good eprom?
if not- may be it is hardware problem

**Brka** · 06-20-2003, 15:59

hi,

I succeeded ...

I tried *#402# + Call button
I have adjusted contrast (up-down and Call button)
but after power-down and power-up again ... contrast is still low ..

what I did ...

I opened the phone
took out small backup battery ...
measured it's voltage ... it was ~2V
I attached it to ext. power supply +5V stabilized
and after 30 sec. detached it
I put it back to phone ... and VOILA ...
contrast is ok.

so ... that was the problem.

b.r.
ALex.

themobileking · 06-21-2003, 22:08

Just dial *#0000# and the send key ...and the phone will save the settings.

**Brka** · 06-22-2003, 13:40

yeah
i succedeed

as I wrote

phone didnt have enough voltage in backup battery
to save contrast settings

so i charged it a little and it worked.

b.r.
Alex.

Fang50 · 05-25-2004, 18:58

Pls can somebody help...I have version 178...when I put in code it says invalid entry...how else can I set contrast on this mobile...

Thnx
Ebrahim

06-20-2003, 02:28	#1 (permalink)
Brka Moderator Join Date: Jun 1999 Location: Serbia Age: 48 Posts: 8,208 Member: 163 Status: Offline Thanks Meter: 7,787	t191 with LOW contrast ... how to repair ? i received brand new t191 v1.24 with very low contrast setting E2P default didnt help flashing to v1.71 also didnt help any working idea ? b.r. ALex.

06-20-2003, 15:59	#3 (permalink)
Brka Moderator Join Date: Jun 1999 Location: Serbia Age: 48 Posts: 8,208 Member: 163 Status: Offline Thanks Meter: 7,787	hi, I succeeded ... I tried #402# + Call button I have adjusted contrast (up-down and Call button) but after power-down and power-up again ... contrast is still low .. what I did ... I opened the phone took out small backup battery ... measured it's voltage ... it was ~2V I attached it to ext. power supply +5V stabilized and after 30 sec. detached it I put it back to phone ... and VOILA ... contrast is ok. so ... that was the problem. b.r. ALex. __________________ Always press THANKS button if my post was helpful!* Please DO NOT send me PM's for help, You can ask for help on forum Do not post THANKS posts - use thanks button ! ALWAYS use SEARCH button before posting!

06-22-2003, 13:40	#5 (permalink)
Brka Moderator Join Date: Jun 1999 Location: Serbia Age: 48 Posts: 8,208 Member: 163 Status: Offline Thanks Meter: 7,787	yeah i succedeed as I wrote phone didnt have enough voltage in backup battery to save contrast settings so i charged it a little and it worked. b.r. Alex. __________________ Always press THANKS button if my post was helpful! Please DO NOT send me PM's for help, You can ask for help on forum Do not post THANKS posts - use thanks button ! ALWAYS use SEARCH button before posting!

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06-20-2003, 03:19	#2 (permalink)
key Member deceased !! Join Date: Aug 2002 Posts: 241 Member: 14646 Status: Offline Thanks Meter: 0	try it code *#402# OK--adjust display intensity/contrast whether varies contrast? You try rewrite good eprom? if not- may be it is hardware problem

06-21-2003, 22:08	#4 (permalink)
themobileking No Life Poster Join Date: Jun 2001 Location: Uranus Age: 53 Posts: 731 Member: 5072 Status: Offline Thanks Meter: 91	Just dial *#0000# and the send key ...and the phone will save the settings.

05-25-2004, 18:58	#6 (permalink)
Fang50 Insane Poster Join Date: May 1999 Posts: 71 Member: 130 Status: Offline Thanks Meter: 2	Pls can somebody help...I have version 178...when I put in code it says invalid entry...how else can I set contrast on this mobile... Thnx Ebrahim